YARN-716. Making ApplicationID immutable. Contributed by Siddharth Seth.
MAPREDUCE-5282. Updating MR App to use immutable ApplicationID after YARN-716. Contributed by Siddharth Seth.
svn merge --ignore-ancestry -c 1487994 ../../trunk/


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1487995 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-5261. Reverting the patch as it is no longer needed.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1488033 13f79535-47bb-0310-9956-ffa450edef68